Euskal Oiloa Chicken Forum

A place to find out more and share what you know about this awesome rare poultry breed! **NOTE: Those who wish to register as a new member on the forum are asked to email eochickenforum@gmail.com and an Administrator will gladly help you join the forum!

2011-12-31 20:32:35

Re: Genetics of color references

PG, in the summer, someone very generously (who in no way wanted to be identified) did some research into this. I have a list to share of some of Campos genetics papers. At the time I had no time to verify any of this before posting it on my website, and the person hoped maybe I would post it there. I also personally felt uncomfortable just copying someone elses work and effectively taking credit for it, so I wanted to take some time and read all of it to be sure of it and familiar with it before blindly copying it. Looks like the time has come to understand it, and make sense of it all.

Here are the links to Campos works. Looks like these pages are from the National Institutes of health in the US and I think going through all of Campos journal papers maybe an idea

In this paper, we briefly review the history of the breed with the correct nameof the five existing varieties. It then describes the various phases of researchconducted with this race. Finally, it mentions the current worrying situation. Keywords: Hen. Conservation. Selection

Page 185"

A Book referenced in it is

"Spanish breeds of hens'by Fernando Orozco Piñán.

I will post the translation of the article from the email as it was sent to me though I can't vouch for its accuracy, there may be clues in there for us. As I said I don't understand if it is stand alone or a lit of references, either way the references will be helpful" Thhere is more breed standard stuff in there too.

Iurramendi, Iñaki Kaskabeltza Baserria (English : Iurramendi, Iñaki Tits Farmhouse) 20140 Andoain (Gipuzkoa) BIBLID [1137-8603 (1999), 14; Pages : 185-189] In this paper, we briefly review the history of the breed with the correct nameof the five existing varieties. It then describes the various phases of researchconducted with this race. Finally, it mentions the current worrying situation. Keywords: Hen. Conservation. Selection

Page 185

----------page break ---------------------

Before we begin we must say that we will not talk technical,but as representatives of Euskal Oilozaleen Elkartea.( Euskal Oilozaleen Elkartea = The Association of Basque Hen Breeders)

This association was formed about ten years ago, with the solepurpose of conservation Euskal Oiloa of race, had a promising start but then had a dip that came close to extinction. A couple of years or three, due to the appalling situation- our chicken, a few "crackpots" brings us back, and today, we insist- We still have illusions.

The information we give is what we have developed in association with data we have gathered little by little and the one in the book "Spanish breeds of hens'by Fernando Orozco Piñán.

1. HISTORY In the seventies was consolidated in the INIA in Madrid underthe direction of F. Orozco in the Conservation Program Spanish breeds fixing character of what was then calledEusko Oiloa, which is the same as what is more correctlycalled Euskal Oiloa now. We should also mention, Genetics qualitative plumageby JL Campo. ( researcher : see "Further Reading" below) )

There are 5 varieties of plumage: • Gorria ("Lepogorria") ( in english: lepo= neck ; gorria = red ) reddish-brown plumage, cape and bright red-orange prisms, At the end of the tippet feathers have at their core black tips. The 8-10feathers on the bottom row of the outer covers are black and the end of the tail.

• Marraduna ("Marradune") ( in english: Marraduna = striped) barred the gene'seffect on the plumage of the "Gorria" plumage makes clear. The rooster ishomozygous lighter than the heterozygote hen.

• Lepasoila It has the same color as the "Gorria" but with the lack of feathers on the neck,shoulders, inner thighs and lateral abdominal areas men.

• Zilarra ( in english: Zilarra = Silver ) It has the plumage of the "Gorria" but changing the reddish-brown by white.

• Beltza (in english : Beltza = Black ) It has all the black feathers with blue-green glow.

2. RESEARCH AND SELECTION

In 1985 from El Encino (INIA) joined the Research Center Fraisoro de Zizurkil (in english: Fraisoro of Livestock Research Center ) (Gipuzkoa) 256 day-old chicks of the variety Gorria and 72 of the variety Marraduna Dad (no translation for "Dad"). These copies are created a database.

Naturzale. 14, 1999, 185-189 14, 1999, 185-189 Page 186

---------------------page break ----------------------

Facts about the Euskal Oiloa

In 1986 he joined from different hamlets, most of Guipúzcoa examples of the variety we Lepasoila. Were incorporated into the database.

Between 1987 and 1991 birds were carried Fraisoro LPG (gorria), MAD (marraduna) and LPS (lepasoila) from different villages.Controls were made ​​by blood and also Fraisoro varieties joined ZIL (Zilarra) and BLZ (Beltza) from villages and Improvement Expanded database and enteredinto the selection and improvement program, Race of the Basque chicken(Euskal Oiloa).

The purpose of that program were: In the first stage (1985/1988) (1985/1988)

As can be seen Euskal Oiloa has been totally abandoned from 1991. In the last six years all that has been done in the center is to keep Fraisoro hardly what you did in its day and now we can say that since no one has have done over the maintenance of Euskal Oiloa, birds are worse least morphologically, than there were five or six years ago.

Naturzale. 14, 1999, 185-189 14, 1999, 185-189 Page 188

--------------page break ---------------

Facts about the Euskal Oiloa

We believe in partnership, there is a work that can not be made ​​by overboard, there is a set pattern, there is some disclosure, at least in Gipuzkoa, and all good chance that there are many fans and why not, some production factors that maintain and evenimprove the Euskal Oiloa as small farms poultry do not require investments and other livestock.

It is clear that there must be CENTERS FOR rearing and growing-Watersupplies TO BELIEVE THAT SMALL FARMS ARE VITAL FOR MAINTENANCERACE AS LIE OILOA EUSKAL.

Naturzale. 14, 1999, 185-189 14, 1999, 185-189 Page 185

( Researcher: I believe this last sentence says there should be "Centers"for the fountainhead {water supplies} stock, however small farms{small breeders} are vital for the maintenance of the race.)

-------------------------------end article ----------------------"

I hope this helps, I didn't really know what to do with it, then forgot about it, and this morning is the longest look I have had.

Re: Genetics of color references

It's a wonderful start Claire. The person who would rather not be credited with this put alot of work into it to get this far! After spending a couple days researching (I started out with the purpose of adding to the breed standard and then got side tracked...) I have realized that with the limited information available plus language barriers plus my rudimentary understanding of genetics and poultry this is going to be a tough slog.

And the color genetics seem really complicated. Not a single recognized breed in the APA SOP with this color and pattern. I played with the color calculator last night for a couple hours and there is more than one gene combination that will cause the same result. Plus I am quite certain the the blonde hens vs brown hens vs red-gold hens are all different. And the light gold roosters vs the mahogany ones. And then there is the grey mottling we have popping up... And the differences in barring. Plus throw in the columbian The color of the chick down may be a help. Yellow chicks should indicate the wheaten gene (E^wh i think) and that is what Compo figured vs. partridge (e^b I think). The more red chicks I haven't figured out yet. Then there are genes for mahogany, gold inhibitor, champagne, gold/silver that could all be affecting the plumage color. Think I am going

I know I am not supposed to be diving into this right now...need to focus on the breed standard and post Topic 1 for our genetics study group but the more I read the more I want to understand.

Re: Genetics of color references

Go for it PG! It may be a tough slog, but it is not impossible. If you feel you need a week to get to grips it a little better that is OK too, it'll help direct where we need to go and which are the most relevant topics. It is hard to learn when you need to already know to understand. If you understood that at all!

Re: Genetics of color references

Wheaten has a cream feather undercolor. e+ and eb have a gray feather undercolor even in the presence of Co. eWhe+ Coco+ heterozygotes have the gray feather undercolor and birds that I have that are eWheb CoCo (I crossed a New Hamp to a Columbian Wyandotte) also have the gray feather undercolor, but it is lighter and looks more silvery than gray. If you find that your birds are eWheb and they have a white or cream feather undercolor they may have melanotic. Birds with melanotic often have a white feather undercolor, but this may be an interaction with some other genes because I don't think that they all have a white undercolor.

Re: Genetics of color references

Re: Genetics of color references

I need to "Hit the Hutt". I've printed up Chapter one. I have to get my head around the terminology. The genetics itself will be OK I think, its translating the terminology (or other language!) into a meaning, something I can visualize. I'll be spending some time on it this weekend.

Thanks for working on this PG and I know here was point where you got your teeth stuck in and couldn't leg go! Keep going

Re: Genetics of color references

AbstractThe genetic basis for plumage color in the Prat fowl, a spanish breed with columbian restricted pattern, was studied, and results of crosses between the Prat and a recessive wheaten tester line (ey/ey co+/co+) or the Castellana breed (E/E), showed that it carries a wheaten allele at the E locus. Crosses between the Prat and the Light Brown Leghorn (e+/e+ co+/co+) or the Brown (eb/eb co+/co+) tester lines showed that the wheaten allele is the dominant one (ewh). These crosses suggested that the brown allele (eb) is also present at low frequency. The dominant columbian restriction gene (Co) seems to be involved in the Prat breed, interacting with the dominant wheaten allele to produce the characteristic plumage of the breed. Results of crosses between the Prat and the Vasca, another Spanish breed with gold columbian restricted pattern and ewh/ewh Co/Co genotype showed that they both differ by one major gene affecting phaeomelanin intensity. The Prat breed is well characterized by the orange buff down and by the ginger red adult plumage.

AbstractIn studies of the genetics of plumage color of Vasca, a Spanish breed of chickens with gold columbian restricted pattern, results of crosses between recessive tester wheaten (ey/ey co+ / co+) with Vasca and F1 from a Castellana × Vasca cross showed that a wheaten allele is the most frequent at the E-locus in Vasca chickens. Crosses between Vasca and light brown Leghorns (e+ / e+ co+ / co+) or brown (eb/eb co+/co+)tester lines showed that the wheaten allele was the dominant one (ewh). These crosses, and the analysis of chick down in pure Vasca populations, suggested that the wild-type (e+) and brown (eb) alleles also are present at low frequencies. Since Vasca is a new breed, created in 1975, this heterogeneity would be expected. The dominant wheaten allele seems to interact with the dominant columbian restriction gene Co, resuiting in the characteristic plumage of the breed. The columbian-type dark brown gene (Db) does not appear to be present in this breed.